Juneau, Alaska Climate

United States

Pop. 31,555 Elev. 9 m / 30 ft TZ: America/Juneau (UTC-8) ·

Winters in Juneau are severe, with temperatures dropping to 10°F (-12°C) in December, while summers bring cool highs of 64°F (18°C) in August. Wind chill can push winter lows to 0°F (-18°C). Expect around 114 rainy days annually (80.9 in / 2054 mm total), with snow on 69 days and 383 in (9725 mm) of annual accumulation. The city averages 47 sunny days per year and around 48 thunderstorm days. Ocean water temperatures reach 54°F (12°C) in summer.

Temperature 64°F (18°C) high 10°F (-12°C) low
Feels like 0°F (-18°C) low
Rain 114 days 80.9 in (2054 mm) /yr
Snow 69 days 382.9 in (9725 mm) /yr
Sky 47 sunny 48 stormy
Wind 3.1 mph (1.4 m/s) avg

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Monthly Climate Chart

↓ Monthly data table
Best months to visit: Jul, Aug

Sky & Air by Month

Cloud cover (%)
87
Jan
58
Feb
73
Mar
86
Apr
91
May
81
Jun
81
Jul
66
Aug
82
Sep
85
Oct
87
Nov
69
Dec
Humidity (%)
84
Jan
71
Feb
76
Mar
80
Apr
84
May
83
Jun
83
Jul
83
Aug
83
Sep
86
Oct
84
Nov
67
Dec

Weather Days by Month

↓ Weather days table

Water Temperatures

↓ Water temperatures table

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Nearby Cities

Nearby

Commercial airport 7 mi Juneau International Airport (JNU)
Ski resort 4 mi Eaglecrest Ski Area
National park 68 mi Atlin/Téix’gi Aan Tlein Provincial Park
Mountain peak (4,935 ft) 5 mi Observation Peak
Hospital 2 mi Bartlett Regional Hospital
Hiking trail 91 mi Indian River Trail

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 33°F 1°C 27°F -3°C 4.2 in 106 mm 87.2 in2215 mm 2
February 29°F -2°C 20°F -7°C 1.7 in 42 mm 35.5 in902 mm 11
March 38°F 3°C 29°F -1°C 0.9 in 24 mm 53.7 in1364 mm 6
April 41°F 5°C 34°F 1°C 6.2 in 158 mm 34.9 in887 mm 1
May 44°F 6°C 36°F 2°C 9.7 in 246 mm 15.0 in382 mm 1
June 56°F 13°C 45°F 7°C 6.8 in 173 mm 2
July 62°F 17°C 51°F 11°C 5.7 in 145 mm 2
August 64°F 18°C 51°F 11°C 7.9 in 201 mm 8
September 57°F 14°C 47°F 8°C 16.7 in 423 mm 4
October 46°F 8°C 38°F 3°C 13.3 in 338 mm 7.3 in184 mm 2
November 36°F 2°C 29°F -2°C 3.4 in 87 mm 76.3 in1939 mm 0
December 17°F -8°C 10°F -12°C 4.4 in 111 mm 72.9 in1852 mm 8

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 2 4
February 11 0
March 6 1
April 1 4
May 1 4
June 2 0
July 2 3
August 8 4
September 4 14
October 2 4
November 0 7
December 8 3

Water Temperatures Data

↑ See chart
Month Ocean Avg High Lake Avg High
January 36°F 2°C 32°F 0°C
February 35°F 1°C 32°F 0°C
March 35°F 2°C 32°F 0°C
April 38°F 3°C 33°F 0°C
May 43°F 6°C 36°F 2°C
June 49°F 9°C 39°F 4°C
July 54°F 12°C 45°F 7°C
August 54°F 12°C 52°F 11°C
September 53°F 12°C 53°F 11°C
October 45°F 7°C 48°F 9°C
November 41°F 5°C 42°F 5°C
December 38°F 4°C 35°F 1°C